html,
body {
  width: 100%;
  height: 100%;
  overflow-y: hidden;
}
html, body, div, span,p{
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}
body{
  line-height: 1;
}
*, *::before, *::after {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}
.intro-mask{
  position: fixed;
  width: 100%;
  height: 100%;
  z-index: 99999;
}
.intro-logo {
  position: absolute;
  width: 100%;
  left: 0;
  top: 0;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9;
}
.tips{
  padding-top: 16px;
  text-align: center;
  font-size: 18px;
  color: #1890ff;
}
.intro-logo svg {
  display: block;
  width: 100%;
  height: auto;
}
.intro-logo path {
  transition: all 0.35s cubic-bezier(0.215, 0.61, 0.355, 1);
  stroke: #1890ff;
  stroke-width: 1.5px;
}
.intro-logo .right {
  transform-origin: right top;
  background-color: #f5f5f5;
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
}
.intro-logo .intro-load {
  position: relative;
  min-width: 80px;
  z-index: 9;
  transform-style: preserve-3d;
  transform-origin: center;
}
.intro-logo .line {
  position: relative;
  z-index: 1;
  width: 100%;
  transform-style: preserve-3d;
  transform: translateZ(3.5vw);
}
.intro-logo .load {
  position: absolute;
  z-index: 3;
  left: 0;
  top: 0;
  width: 100%;
  clip-path: circle(0% at 50% 50%);
  transform-style: preserve-3d;
  transform: translateZ(3.5vw);
}
/* 进度条 */
.slider {
  margin-top: 4px;
  width: 321px;
  height: 10px;
  background: #ccc;
  border-radius: 50px;
  border: 1px solid #eee;
  position: relative;
}
.ball {
  position: absolute;
  top: 1px;
  width: 0;
  height: 8px;
  border-radius: 50px; 
  background: #1890ff;
  transform-origin: 50% 50%;
}